<?php
/**
 * Copyright (c) 2010, Slawomir Mazur <mazursllawek@gmail.com>
 * 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions 
 * are met:
 * 
 * o Redistributions of source code must retain the above copyright notice, 
 *   this list of conditions and the following disclaimer.
 * o Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * o Neither the name of the Softisland nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * Enter description here...
 *
 * @package     admin
 * @copyright   Slawomir Mazur (c) 2010 (http://www.zend.com/zce.php?c=ZEND011643)
 * @license     http://www.opensource.org/licenses/bsd-license.php
 * @author      Slawomir Mazur <mazursllawek@gmail.com>
 */

class Gp_Core_ModelLoader
{
	public static function loadClass($class, $dirs = null)
    {
    	if (class_exists($class, false) || interface_exists($class, false)) {
            return;
        }
        
    	if ((null !== $dirs) && !is_string($dirs) && !is_array($dirs)) {
            require_once 'Zend/Exception.php';
            throw new Zend_Exception('Directory argument must be a string or an array');
        }
        
        if (false === strpos($class, '_')) {
        	require_once 'Zend/Exception.php';
            throw new Zend_Exception('Wrong class name');
        }
        
        // Autodiscover the path from the class name
        $classArr = explode('_', $class);
        if (count($classArr) != 3) {
        	return false;
        }
        
        $module = strtolower($classArr[0]);
        $modelsDir = strtolower($classArr[1]) . 's';
        $fileName = ucfirst($classArr[2]);
        
        if (empty($module) || empty($modelsDir) || empty($fileName)) {
        	return false;
        }
        
        $file = $dirs . DS . implode(DS, array($module, $modelsDir, $fileName)) . '.php';
        
        Zend_Loader::loadFile($file);
        
    	if (!class_exists($class, false) && !interface_exists($class, false)) {
            require_once 'Zend/Exception.php';
            throw new Zend_Exception("File \"$file\" does not exist or class \"$class\" was not found in the file");
        }
    }
}